Strain.



ATETED APR. Ll, lQGL STRAEEI APE'LICATIGE ELED AUG. 24, 1901.

UNiTnD Srarns i-JGUS STEINBERG'ER,

Patented April 4;, 1.995.

rricn.

SPECIFICATION forming part or" Letters Patent No. 786,691., dated Api-i141, 1905.

Application filed August 24's, 1.90/2. Serial No. 221,966.

Be it known that I, LOUIS S'rnini'snnsnn, citizen of the United States, and a resident ot the city of New York, borough oiI Brooklyn, inthe county of Kings and State of `New York, have invented a new and Improved Strain, ot which the Yfollowing is a full, clear, and exact description.

l\fly invention relates to strains of the kind employed in connection with wiring, and admits ot' general use for all purposes in which a strain is generally employed.

My invention relates more particularly to certain improvements in construction whereby additional results are produced, as described below and pointed out in the claims.

Reference is to be had tothe accompanying drawings, forming a part of this speciiication, in which similar characters or" reference indicate corresponding parts in all the views.

Figure 1 is a perspective view showing my strain in connection with a turnbuckle. Fig. 2 is an enlarged longitudinal vertical section approximately through the center of the strain. Fig. 3 isa vertical cross section through the strain upon the line 3 3 of Fig. 2I iooking in the direction of the arrow. l* ig. #i is a central vertical cross-section taken upon the line 4 of Fig. 2 iookingin the direction of the arrow. Fig. 5 is a -front elevation oi" the washer 17, of insulating material. lEig. 6 is a perspective view of the detachable linkstay 21, Fig. 7 is a front elevation of one et the metallic bearing-disks 1Q.

The cylindrical tensile members 9 are connected together by a thickened bearing por tion 10, having', preferably, an oval crossesection, as indicated at the right of Fig. 2, and are provided with integral heads 11, preferably oval in general outline and otherwise ci the shape indicated. Two metallic disks 12 are provided with bearing-apertures 13, cach having substantially the form oll a mutilated ellipse. Each disk 12 is further provided with slots 14 14C, each slot 1li merging into a bearing-aperture 13. By this means shoulders 1.5 are Jformed at the bottom oi" the bearing-apertures 13 and are engaged directly by the heads 11. The bearing-apertures 13 being elliptical in form, as indicated in Fig. 7,

leave portions 16, of metal, so disposed as to partially encircle the heads 11. The object ot' this arrangement is to prevent the heads 11 from approaching each other when the strain is subjected to great mechanical stress. lV make the tensile members 9 substantially parallel with each other., as indicated in Fig. il, rather than inclined toward each other. The tensile members 9 and the connecting or thickened portion 10 together constitute a forni ol link which is @shaped rather than V.-sha'ped, thus paralleling the direction of stress as be tween the. two tensile members.

ln order to provide against lateral movenient oi" the tensile members 9 relatively to each other, i insert a stay 21 between them and provide the stay with concave iaces Q2 23, engaging the respective tensile members il. The latter being parallel, as above stated, the stay 21 may be moved to any point intermediate of the heads 1 1 and the thickened portion 10. Preferably the tensile members Si spring tightly against the concave faces 22 22? ot the stay, se as to hold it lirmly in position at any point at which it may be spaced from the heads.

To as. cmblc the strain, l take the two disks i12 and place one of them upon each side o the washer 17, ol insulating material. This washer is provided with a substantially crossshapcd slot 2%, and this slot is turned into registry with the slots ist le" oi' the disks. The disks are so disposed relatively to each other that the slot ifi oi one disk registers with the slot 1% oi the other. The stays Q1 need not be removed from the links in assembling the strain, but ma be slipped toward the connecting portions 10 and located at any desired point. The disks, washer, and links being in position, the device is placed within a niold and pressed up with a mass of insulating material i8, preferably provided with a central bead 1S) and with end beads 20, so as to assume the general conformity indicated in Figs. 1 and 2.

it will be noted that while the links are closed by means ot the. stays 21, yet the closed members thus formed do not interlink in the sense that the closed metallic member formed by one of the links and its stay 2l encircles any IOO parl" oi' tl e other link or of iis stay 21. in the strict sense oi' the word therefore, the ltwo links do not interlink with enrch other.

its will he seen in Fin'. l, eitheroll the links ninv he ennsed to engr-.ge nn eye 25. provided with n holt Q5. the hol Ys being thus connected with toe stun 'llhis holt is threaded :1nd is eng Vred hv the turnhuekle L?, which also engages n threaded holt 28, provided with :in eye 29, to which n wire or other iixture ninv he seeured. Bv rotnting the tnrnlnickle 2T the niechnnicnl tension upon the s rain anniv l e increased or decreased nt will.

illy invention ndinits of :i vnriety olf use.4 one eoinhinnt-ions, ns will he rendilv understood hy; n person skilled in the nrt to which it heloi '.lhe strnetnre ol the strziin-insnlntor is snel that nll "E the inetel perils ninv he inode et chop-forged steel or of othe preferred metal., thus ohtziiur n inoxinunn ol strength with zt ininiinun o ht. i'flv strain possess s erdn'r-ordi n l,

' le strene'th, which innv he oinhined with the inost :risoluto eert-:iintv oi insulation.

l'lnvino usdeserihed in vinvenfion, lclniin ns new one i esire to secure h5; Letters l'lntentfV l. fir strni-i comprising-j n plurnlity ol inetnllic ks provided n.t. henring;nertn; .y links engrtgineI sind disksl sind provided with heeds engog' seid henri n.pertures, stnys engen no; seid links :ind disposed :is to iorin therewith closed n'ieinhers whieh do not interlink witl eneh other, :ind e nieinher of insu- L rirl interposed between sind disks.

lzrtin mote A stron eennprisling,- e lnetnllie disk provided with henrino'-apertures and with portions oi' inetnl pnr :illy encirclingl snid henri'iig'-npei'ti n. link engin ing seid disk and provided with hends engaging seid honi-ino'- :niertures end sind portions of metal., seid hends being' prevented 'iroin nioi'ing' toward fer-ch other hy sind pfn'tions ot rnetsl. und n` stay connected with seid link :for iliurtlier prevfenting sind hends liroin moving' relatively te eseh other.

3. A strain, eoinprisin i. plurality ol ineinhers provided with heni'iii'epei'tiii'es disposed within the peripherjyY ol said ineinhers., insulstine materiel disposed hetveen nid nieniher 'y Aink., provided with in J:ins for eng'ngg'ing' sind h wiring-opertures, end ineens tor producing; n tension :is between snid rnoxnhers and seid links.

4. strain Comprising n. ineinher provided with hearing'-surlinees :ind nv link provided with strain ineinhers connected to snid ineniher, seid link heine; Yfurther provided with n stoy or hr/tieingr nien'ihe las nn nrticle "if inzinnlnetnrej s link provided with n plnrslil',\,Y olE tensile members pin'- :illel to enc-h other :ind hnvinggl o fnl strnin-hezuls nt the ends ot' seid tensile nlenihers.

7. ./fis nn nrticle olf nnniuincture, n link provided with it plurality olE tensile ineinhers und also provided with strsiirhends, seid link n ieinhers heilig' lnrl'fher pro\,ideiv with n. stztv or neinher ndinsinhle relnti velv thereto. i' nn nrtiele ol'I ninnu inclure, n, link meinloer provided witl :t plural-li v ol tensile ineniu hers., end also provided wnn n detnehnhle or bracing' nieinher ndiusinhle relntivelv7 1thereto.

i). is :in nrticle ol 1 nilncturiif, :l link provided with s plurnlitvY oli tensile nn'nnhors purnllel to inch othe :ind :Also provided \1.tl :i metallic stoy :uljnstnhle rolntivelv 'to said link Vtor hrz eine' the saine.

l0. ris :in article ol' inninilncture, n strzrin inenifier proviiiled with :i pluralityv ol :ipertln'es d togetl'iernnd also provided with henrdepressed relntivelg,7 to the nornini snrt'nce el sold nieniher Ytor tl e purpose o' enggnging' the hefuls ot strztin nieinhers.

ll. st 'nin coinprisiinr :i niel'nllie rneinher provided with henring'-apertures inrlosed within the outer limits oli snid inornher und `prowded with shoulders, und :i plurnlitv olAl sti-nin nienihers connected to sziid inetnllic nieinher find provided `with hends engngjine' said shoulders.

fr strain coinprif-lingg' n. link providii-d with heads n ineniher provided with hearing recesses entirel),Y .vithin the peripheigvY of seid inen'iher 'for engngingsnid heads. und n niot1illic ineinher ier preventing' snid hends Vlroni rn ving' relntively townrd ench other.

A strain comprising' n ineinher provided with hearing-surfaces und with portions plus tinllj. ,ncircling sziid lrearing-surlnces, :i link ed with strnil'i-hezuls. snid hends engen d hearing-snrlizices, end n hrfice lor pre-A ng' seid heads 'troni moving' relatively to\\.'r,.rd zieh other.

14.-. A strain eoinprising :L link provided with tensile inenihers Vlier enggngin disks n' the like, s. nie 'nllie stzrv d inenihers Ator the purpose ol prevention' ln tei relnliveij,y to rech other7 :n

movement theres.y

'tegral with said metallic disk for the purpose of strengthening the saine, links provided with heads engaging' said projecting portions and prevented thereby frein moving1 laterally in relation to eacli other, and a mass of insulation engaging said links and said metallic disks.

in testimoniY whereoi l have signed my naine to this specilication in the presence of two subscribing witnessesw LOUS S CNBERGEE. .f'fitnesses:

ififAL'roN Hiiniiisox, Evniniei) Boi/roei lvlAiisiiiiLL. 

